AMD Vega 64 Watercooled wont boot green light

I have a Saphire AMD vega 64 Graphics card that i have been using for a while, I have just transferred the contents of my case into another case (exact same config and setup) but now my GPU wont detect, It only displays a green light next to the power plugs and the motherboard makes beeps as thought the GPU is not detected. Any Ideas? Please and thank-you in advance. The Machine is using PCI-e 2.0 on a first generation i7 and as i said it has been working for around a month in this machine (got it as soon as it was available at my local retailer)